Improvement in buttons and studs



MRANSOM.

Buttons and Studs.

No. 206,687. Patented Aug. 6, 1878.

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UNITED STATES PATENT OFFICE.

MARTIN RANSOM, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN BUTTONS AND STUDS.

Specification forming part of Letters Patent No. 206,687, dated August6,1878; application tiled May 13, 1878.

To all whom it may concern:

Be it known that I, MARTIN RANSOM, of the city of Chicago, county ofCook, and State of Illinois, have invented a new and Improved Button andStud Fastening; and I hereby declare the following to be a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, of which- Figure 1 is an enlarged vertical central section ofmy device as applied in fastening a button to cloth; and Figs. 2, 3, and4, enlarged detail views.

My invention relates to an improvement in that class ofbutton-fastenings in which two concavo-convex disks, provided withsawlike teeth about their peripheries, one fixed to the extremity of theshank and the other serving as the head of a screw which passes throughthe cloth and enters the shank as anut, clutch in the opposite sides ofthe cloth, thus resisting the turning back of the screw.

The defect which has always hitherto existed in this class of fastenings has been the lack of means for permitting the ready removal of thebutton, in consequence of which such removal could be effected only bythe eX- ertion of sufficient force to tear the teeth loose from thefabric, or else by cutting the fabric away.

The object of my invention is to overcome this defect by combining withthe fastening device above referred to means adapted to per mit theready unscrewing of the button when desired, notwithstanding thecatching of the teeth in the cloth, and this without causing any unduestrain either upon the fabric or any part of the fastening device.

To this end my invention consists in having the disk upon the shankprovided with an angular aperture in its center, which aperture exactlyiits an angular shoulder at the end of the yshank contiguous to thebutton, but turns freely on the remaining portion of the shank, which isof smaller dimensions than the shoulder and cylindrical, the disk beingprevented from slipping olf the cylindrical part or neck by a Jflange atthe end, whereby this disk acts conjointly with the other disk insecuring the button, and also admits of the ready removal of the latter,all as hereinafter more fully set forth.

Referring to the drawings, A is the head of the button, which may be ofany kind or configuration; and B, the hollow stem, provided with thesquare shoulder r, neck s, and flange t, in the order shown, andthreaded on the inside.

O is the upper concavo-convex disk, having the angular aperture u in itscenter', of such dimensions as to turn easily on the neck s, on which itis retained by the flange t, and exactly to t the square shoulder r.This disk C is also provided at its periphery with teeth c, pointing tothe left, or in the direction of the reverse turning of the screw.

C is the under disk, having teeth v', similar to those of the upperdisk, and serving, also, as the head of the screw D.

To fasten the button or stud the screw D is passed through the clothfrom the inside and the button screwed upon it, as represented in Fig.1, E being the cloth. As the button is screwed into place the disk G isgradually forced up thc stem B until it passes upon the square shoulder'r, after which it is obliged to turn with the head A. As the screwtightens the teeth o on tlrennder disk are forced into the cloth.

It is obvious that it is now impossible to unscrcw the button, for anyattempt to turn the head A backward is resisted by the catching in thecloth of the teeth v while any attempt to turn the disk C backward issimilarly resisted by the catching of the teeth c'. It is thereforeplain that the button cannot be removed until the disk C has been forcedoff the shoulder r. This is done by pressing it inward with thethumb-nail, or with any other hard agent, when the cloth will alwaysyield sufficiently to allow it to be-freed from the shoulder, which maybe made very short. This done, the button may be readily unscrewed.

When the fastening is designed for shirtstuds and cuff-buttons, or forany other application wherein the material or fabric is of a thin orunyieldin g nature, the upper disk may be formed so thin as to be itselfyielding, and thus easily pressed off the shoulder, and of a substancesufciently elastic to resume its s, and flange t,the1oose toothed diskC, screw proper shape when the pressure is removed. D, and fixed tootheddisk C', substantially as It may in some eases be advantageous to formdescribed. both disks in this manner.

What I claim as new, and desire to secure by Letters Patent, is-

In a button, the combination of the stem B, provided, as shown, with theshoulder r, neck MARTIN RANSOM.

In presence of- H. E. WODKEY, E. F. MERRILL.

